9x19mm Parabellum, the pistol cartridge adopted by NATO but the 9 mm NATO has different parameters than commercial makes (dimensions and pressure).

7.65x22mm Parabellum, also called .30 Luger in the USA, from which the 9x19mm cartridge was dervied.

The term may be used to refer to one of these cartridges, or to a German, Austrian or Swiss pistol chambered for one of those cartridges. The 9x19mm Parabellum is one of the most widely used pistol cartridges in use. The phrase a Parabellum usually refers to the Luger P08 pistol. The term may also apply to the Parabellum MG14 machine gun.